.demo{
    .header{
        background: #4D86FF !important;
        font-size: 20px;
        font-weight: 600;
        color: white;
        height: 64px;
        line-height: 64px;
        position: static;
    }

    .menu{
        overflow-y: auto;
        width: 220px;

        :global {
            .ant-menu-submenu-selected.ant-menu-submenu-open > .ant-menu-submenu-title {
                background-color: white;
                color: rgba(0, 0, 0, 0.65);
            }
        }
    }
}